var turnplate = {
    restaraunts: [],				//大转盘奖品名称
    colors: [],					//大转盘奖品区块对应背景颜色
    outsideRadius: 192,			//大转盘外圆的半径
    textRadius: 155,				//大转盘奖品位置距离圆心的距离
    insideRadius: 68,			//大转盘内圆的半径
    startAngle: 0,				//开始角度

    bRotate: false				//false:停止;ture:旋转
};

$(document).ready(function () {
    // 	var swiper1 = new Swiper('.swiper1', {
    //     pagination: '.swiper-pagination',
    //      slidesPerView: 'auto',
    //      centeredSlides: true,
    //      paginationClickable: true,
    //      spaceBetween: 0
    //  });
    //  var swiper2 = new Swiper('.swiper2', {
    //     pagination: '.swiper-pagination',
    //     slidesPerView: 4,
    //      paginationClickable: true,
    //      spaceBetween: 30,
    //      freeMode: true
    //  });
    //  
    //  var swiper1 = new Swiper('.swiper3', {
    //     pagination: '.swiper-pagination',
    //      slidesPerView: 'auto',
    //      centeredSlides: true,
    //      paginationClickable: true,
    //      spaceBetween: 0
    //  });

    $("#datepicker").datepicker({
        inline: true,
        showOtherMonths: true,
        dateFormat: "yy/mm/dd",
        defaultDate: 0,
    });


    $(function () {
        var currYear = (new Date()).getFullYear();
        var opt = {};
        opt.date = { preset: 'date' };
        opt.datetime = { preset: 'datetime' };
        opt.time = { preset: 'time' };
        opt.default = {
            theme: 'android-ics light', //皮肤样式
            display: 'modal', //显示方式 
            mode: 'scroller', //日期选择模式
            dateFormat: 'yyyy-mm-dd',
            lang: 'zh',
            showNow: true,
            nowText: "今天",
            startYear: currYear - 70, //开始年份
            endYear: currYear //结束年份
        };

        $("#appDate").mobiscroll($.extend(opt['date'], opt['default']));
    });



    //动态添加大转盘的奖品与奖品区域背景颜色
    turnplate.restaraunts = ["50M免费流量包", "10闪币", "谢谢参与", "5闪币", "10M免费流量包", "20M免费流量包", "20闪币 ", "30M免费流量包", "100M免费流量包", "2闪币"];
    turnplate.colors = ["#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF"];


    var rotateTimeOut = function () {
        $('#wheelcanvas').rotate({
            angle: 0,
            animateTo: 2160,
            duration: 8000,
            callback: function () {
                alert('网络超时，请检查您的网络设置！');
            }
        });
    };

    //旋转转盘 item:奖品位置; txt：提示语;
    var rotateFn = function (item, txt) {
        var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length * 2));
        if (angles < 270) {
            angles = 270 - angles;
        } else {
            angles = 360 - angles + 270;
        }
        $('#wheelcanvas').stopRotate();
        $('#wheelcanvas').rotate({
            angle: 0,
            animateTo: angles + 1800,
            duration: 8000,
            callback: function () {
                alert(txt);
                turnplate.bRotate = !turnplate.bRotate;
            }
        });
    };

    $('.pointer').click(function () {
        if (turnplate.bRotate) return;
        turnplate.bRotate = !turnplate.bRotate;
        //获取随机数(奖品个数范围内)
        var item = rnd(1, turnplate.restaraunts.length);
        //奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
        rotateFn(item, turnplate.restaraunts[item - 1]);
        /* switch (item) {
			case 1:
				rotateFn(252, turnplate.restaraunts[0]);
				break;
			case 2:
				rotateFn(216, turnplate.restaraunts[1]);
				break;
			case 3:
				rotateFn(180, turnplate.restaraunts[2]);
				break;
			case 4:
				rotateFn(144, turnplate.restaraunts[3]);
				break;
			case 5:
				rotateFn(108, turnplate.restaraunts[4]);
				break;
			case 6:
				rotateFn(72, turnplate.restaraunts[5]);
				break;
			case 7:
				rotateFn(36, turnplate.restaraunts[6]);
				break;
			case 8:
				rotateFn(360, turnplate.restaraunts[7]);
				break;
			case 9:
				rotateFn(324, turnplate.restaraunts[8]);
				break;
			case 10:
				rotateFn(288, turnplate.restaraunts[9]);
				break;
		} */
        console.log(item);
    });


});


function rnd(n, m) {
    var random = Math.floor(Math.random() * (m - n + 1) + n);
    return random;

}


//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
window.onload = function () {
    drawRouletteWheel();
};

function drawRouletteWheel() {
    var canvas = document.getElementById("wheelcanvas");
    if (canvas.getContext) {
        //根据奖品个数计算圆周角度
        var arc = Math.PI / (turnplate.restaraunts.length / 2);
        var ctx = canvas.getContext("2d");
        //在给定矩形内清空一个矩形
        ctx.clearRect(0, 0, 422, 422);
        //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式  
        ctx.strokeStyle = "#FFBE04";
        //font 属性设置或返回画布上文本内容的当前字体属性
        ctx.font = '16px Microsoft YaHei';
        for (var i = 0; i < turnplate.restaraunts.length; i++) {
            var angle = turnplate.startAngle + i * arc;
            ctx.fillStyle = turnplate.colors[i];
            ctx.beginPath();
            //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）  

            ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
            ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
            ctx.stroke();
            ctx.fill();
            //锁画布(为了保存之前的画布状态)
            ctx.save();

            //----绘制奖品开始----
            ctx.fillStyle = "#E5302F";
            var text = turnplate.restaraunts[i];
            var line_height = 17;
            //translate方法重新映射画布上的 (0,0) 位置
            ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

            //rotate方法旋转当前的绘图
            ctx.rotate(angle + arc / 2 + Math.PI / 2);

            /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
            if (text.indexOf("M") > 0) {//流量包
                var texts = text.split("M");
                for (var j = 0; j < texts.length; j++) {
                    ctx.font = j == 0 ? 'bold 20px Microsoft YaHei' : '16px Microsoft YaHei';
                    if (j == 0) {
                        ctx.fillText(texts[j] + "M", -ctx.measureText(texts[j] + "M").width / 2, j * line_height);
                    } else {
                        ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
                    }
                }
            } else if (text.indexOf("M") == -1 && text.length > 6) {//奖品名称长度超过一定范围 
                text = text.substring(0, 6) + "||" + text.substring(6);
                var texts = text.split("||");
                for (var j = 0; j < texts.length; j++) {
                    ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
                }
            } else {
                //在画布上绘制填色的文本。文本的默认颜色是黑色
                //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
                ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
            }

            //添加对应图标
            if (text.indexOf("闪币") > 0) {
                var img = document.getElementById("shan-img");
                img.onload = function () {
                    ctx.drawImage(img, -15, 10);
                };
                ctx.drawImage(img, -15, 10);
            } else if (text.indexOf("谢谢参与") >= 0) {
                var img = document.getElementById("sorry-img");
                img.onload = function () {
                    ctx.drawImage(img, -15, 10);
                };
                ctx.drawImage(img, -15, 10);
            }
            //把当前画布返回（调整）到上一个save()状态之前 
            ctx.restore();
            //----绘制奖品结束----
        }
    }
}


